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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 826 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.2/3 − 1/5 =
  2. 2.A bottle has 8/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.1/2 − 1/7 =
  4. 4.Diya has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.1/2 − 3/8 =
  6. 6.5/9 − 1/6 =
  7. 7.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  8. 8.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.Riya has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  10. 10.5/8 − 1/2 =
  11. 11.A bottle has 4/5 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  12. 12.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.Aarav has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  15. 15.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  16. 16.9/10 − 1/6 =
  17. 17.Ishaan has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  18. 18.3/7 − 1/3 =
  19. 19.A bottle has 9/10 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 3/5 =
  21. 21.1/3 − 2/9 =
  22. 22.A bottle has 4/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.Rohan has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  24. 24.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 5/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.3/4 − 2/5 =
  28. 28.A bottle has 5/6 litre of juice. Anaya drinks 2/9 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 3/5 =
  30. 30.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  31. 31.Tara has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.2/3 − 1/6 =
  33. 33.A bottle has 7/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.7/9 − 1/2 =
  35. 35.7/10 − 2/5 =
  36. 36.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.2/3 − 2/5 =
  38. 38.A bottle has 3/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 3/10 =
  40. 40.3/5 − 1/2 =

Answer key

  1. 7/15
  2. 13/18
  3. 5/14
  4. 5/12
  5. 1/8
  6. 7/18
  7. 3/10
  8. 11/30
  9. 13/30
  10. 1/8
  11. 7/10
  12. 7/12
  13. 1/14
  14. 1/8
  15. 11/21
  16. 11/15
  17. 19/30
  18. 2/21
  19. 3/10
  20. 3/20
  21. 1/9
  22. 1/9
  23. 1/20
  24. 5/24
  25. 8/21
  26. 7/18
  27. 7/20
  28. 11/18
  29. 3/10
  30. 1/20
  31. 1/12
  32. 1/2
  33. 4/9
  34. 5/18
  35. 3/10
  36. 4/15
  37. 4/15
  38. 2/21
  39. 1/5
  40. 1/10

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